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SubjectRe: [RFC PATCH 6/6] perf cs-etm: Add warnings for missing DSOs
Em Thu, Jul 29, 2021 at 04:58:05PM +0100, James Clark escreveu:
> Currently decode will silently fail if no binary data is available for
> the decode. This is made worse if only partial data is available because
> the decode will appear to work, but any trace from that missing DSO will
> silently not be generated.
>
> Add a UI popup once if there is any data missing, and then warn in the
> bottom left for each individual DSO that's missing.

Looks ok to me (the last 3 patches in this series, the rest I applied
already), can I get some Acked-by/Reviewed-by from the CoreSight people?

Thanks,

- Arnaldo

> Signed-off-by: James Clark <james.clark@arm.com>
> ---
> tools/perf/util/cs-etm.c | 10 +++++++++-
> 1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/tools/perf/util/cs-etm.c b/tools/perf/util/cs-etm.c
> index 32ad92d3e454..e6851260d059 100644
> --- a/tools/perf/util/cs-etm.c
> +++ b/tools/perf/util/cs-etm.c
> @@ -746,8 +746,16 @@ static u32 cs_etm__mem_access(struct cs_etm_queue *etmq, u8 trace_chan_id,
>
> len = dso__data_read_offset(al.map->dso, machine, offset, buffer, size);
>
> - if (len <= 0)
> + if (len <= 0) {
> + ui__warning_once("CS ETM Trace: Missing DSO. Use 'perf archive' to export data from the traced system.\n");
> + if (!al.map->dso->auxtrace_warned) {
> + pr_err("CS ETM Trace: Debug data not found for address %#"PRIx64" in %s\n",
> + address,
> + al.map->dso->long_name ? al.map->dso->long_name : "Unknown");
> + al.map->dso->auxtrace_warned = true;
> + }
> return 0;
> + }
>
> return len;
> }
> --
> 2.28.0
>

--

- Arnaldo

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